Changes

[[AltaVista]] was a popular early search engine in 1995, but its slow speed caused it to lose out to [[Google]], which would retrieve information almost instantaneously based on presorted techniques. In the December 2008 Nielsen Online rankings, Google had over 62% of the search traffic on the Internet, and [[Yahoo!]] is a distant second. Google, Yahoo and AOL all showed good year-on-year growth, with [[Microsoft]]'s  MSN/Live Search being the biggest loser.<ref>http://searchenginewatch.com/3632382</ref> Other new search engines have been developed as well, such as Microsoft's [[Bing]] (the alternative to MSN/Live Search), and another [[web site]] called [[Duck Duck Go]]. Each search engines aims to compete against the more commonly used information retrieval sites, and in doing so, they each typically have their own unique driver or capability that others do not offer.  

[[AltaVista]] was a popular early search engine in 1995, but its slow speed caused it to lose out to [[Google]], which would retrieve information almost instantaneously based on presorted techniques. In the December 2008 Nielsen Online rankings, Google had over 62% of the search traffic on the Internet, and [[Yahoo!]] is a distant second. Google, Yahoo and AOL all showed good year-on-year growth, with [[Microsoft]]'s  MSN/Live Search being the biggest loser.<ref>http://searchenginewatch.com/3632382</ref> Other new search engines have been developed as well, such as Microsoft's [[Bing]] (the alternative to MSN/Live Search), and another [[web site]] called [[Duck Duck Go]]. Each search engines aims to compete against the more commonly used information retrieval sites, and in doing so, they each typically have their own unique driver or capability that others do not offer.  

==Coding==

==Technical requirements==

It is estimated that at least a million lines of code is needed for a working search engine.  Two open source search engines are Elasticsearch and Solr.<ref>https://www.searchtechnologies.com/blog/solr-vs-elasticsearch-top-open-source-search</ref>

It is estimated that at least a million lines of code is needed for a working search engine.  Two open source search engines are Elasticsearch and Solr.<ref>https://www.searchtechnologies.com/blog/solr-vs-elasticsearch-top-open-source-search</ref> Search engines for the public internet also require an enormous amount of information on crawled websites, and "spiders" which continuously crawl the web to update this information are also required. This means that significant computing and data storage resources are needed.

==References==

==References==